package com.example.forum.controller;

import com.example.forum.common.AppResult;
import com.example.forum.common.ResultCode;
import com.example.forum.config.AppConfig;
import com.example.forum.model.Message;
import com.example.forum.model.User;
import com.example.forum.service.IMessageService;
import com.example.forum.service.IUserService;
import com.sun.istack.internal.NotNull;
import io.swagger.annotations.Api;
import io.swagger.annotations.ApiOperation;
import io.swagger.annotations.ApiParam;
import lombok.NonNull;
import lombok.extern.slf4j.Slf4j;
import org.springframework.web.bind.annotation.*;

import javax.annotation.Resource;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpSession;
import java.util.List;

@Slf4j
@Api(tags = "站内信接口")
@RestController
@RequestMapping("/message")
public class MessageController {

    @Resource
    private IMessageService messageService;

    @Resource
    private IUserService userService;

    @ApiOperation("发送站内信")
    @PostMapping("/send")
    public AppResult send(HttpServletRequest request,
                          @ApiParam("接收者id") @RequestParam("receiveUserId") @NonNull Long receiveUserId,
                          @ApiParam("内容") @RequestParam("content") @NonNull String content){
        //获取当前登录的用户信息
        HttpSession session=request.getSession(false);
        User user=(User)session.getAttribute(AppConfig.USER_SESSION);
        //1、当前登录用户状态，如果是禁言不能发站内信
        if(user.getState()==1){
            return AppResult.failed(ResultCode.FAILED_USER_BANNED);
        }
        //2、不能给自己发送
        if(user.getId()==receiveUserId){
            return AppResult.failed("不能给自己发送消息");
        }
        //3、校验接收者是否存在
        User receiveUser=userService.selectById(receiveUserId);
        if(receiveUser==null||receiveUser.getDeleteState()==1){
            return AppResult.failed("接收者状态异常");
        }
        //4、封装对象
        Message message=new Message();
        message.setPostUserId(user.getId());
        message.setReceiveUserId(receiveUserId);
        message.setContent(content);
        //5、调用service
        messageService.create(message);
        //6、返回结果
        return AppResult.success("发送成功");
    }

    @ApiOperation("获取未读数")
    @GetMapping("/getUnreadCount")
    public AppResult<Integer> getUnreadCount(HttpServletRequest request){
        //1.获取当前登录的用户
        HttpSession session=request.getSession(false);
        User user=(User)session.getAttribute(AppConfig.USER_SESSION);
        //2.调用service
        Integer count=messageService.selectUnreadCount(user.getId());   //当前登录用户的id就是接收者的id
        //3.返回结果
        return AppResult.success(count);
    }

    @ApiOperation("查询用户的所有站内信")
    @GetMapping("/getAll")
    public AppResult<List<Message>> getAll(HttpServletRequest request){
        //1.获取当前登录的用户
        HttpSession session=request.getSession(false);
        User user=(User)session.getAttribute(AppConfig.USER_SESSION);
        //2.调用service
        List<Message> messages=messageService.selectByReceiveUserId(user.getId());
        //3.返回结果
        return AppResult.success(messages);
    }

    @ApiOperation("更新为已读")
    @PostMapping("/markRead")
    public AppResult markRead(HttpServletRequest request,
                              @ApiParam("站内信id") @RequestParam("id") @NonNull Long id){
        //1.根据id查询站内信
        Message message = messageService.selectById(id);
        //2.站内信是否存在
        if(message==null||message.getDeleteState()==1){
            return AppResult.failed(ResultCode.FAILED_MESSAGE_NOT_EXISTS);
        }
        //3.站内信是不是自己的
        HttpSession session=request.getSession(false);
        User user=(User) session.getAttribute(AppConfig.USER_SESSION);
        if(user.getId()!=message.getReceiveUserId()){
            return AppResult.failed(ResultCode.FAILED_FORBIDDEN);
        }
        //调用service，把状态更新成已读
        messageService.updateStateById(id,(byte)1);
        return AppResult.success();
    }

    @ApiOperation("回复站内信")
    @PostMapping("/reply")
    public AppResult reply(HttpServletRequest request,
                           @ApiParam("要回复的站内信Id") @RequestParam("repliedId") @NotNull Long repliedId,
                           @ApiParam("站内信的内容") @RequestParam("content") @NotNull String content){
        //校验当前登录用户的状态
        HttpSession session=request.getSession(false);
        User user= (User) session.getAttribute(AppConfig.USER_SESSION);
        if(user.getState()==1){
            //返回错误描述
            return AppResult.failed(ResultCode.FAILED_USER_BANNED);
        }
        //校验回复的站内信状态
        Message existsMessage=messageService.selectById(repliedId);
        if(existsMessage==null||existsMessage.getDeleteState()==1){
            return AppResult.failed(ResultCode.FAILED_MESSAGE_NOT_EXISTS);
        }
        //无法给自己回复
        if(user.getId()==existsMessage.getPostUserId()){
            return AppResult.failed("不能给自己站内信回复");
        }
        //构造对象
        Message message=new Message();
        message.setPostUserId(user.getId());
        message.setReceiveUserId(existsMessage.getPostUserId());
        message.setContent(content);
        //调用service
        messageService.reply(repliedId,message);
        return AppResult.success();

    }
}
